The Facebook group has come to love the swans — an image of the fuzzy cygnets and their mother was quickly made the group's featured image.

The intriguing swan song is nothing new. Back in 2010, residents watched as a lone male swan finally discovered a mate, who then produced five cygnets. The neighborhood named her Autumn Grace.

While swans have become beloved for their snowy-white plumage and elegant appearance, they are an aggressive species, naturalist Marj Rines of the Massachusetts Audubon Society told the Enterprise in March.

“The more attention you give them, the more irritated they will become,” she said. “Swans can be extremely territorial, and the mate could certainly come up on land and attack people.”

Mute swans, the most common species (identified by their orange beak) were imported from Europe in the early 20th century for their aesthetic appeal, according to the Mass Audubon’s website. They quickly established themselves as wild, breeding birds in New England.

The population of mute swans in Massachusetts is about four times larger than it was in the 1970s, according to Mass Audubon data.